Yamaha RX-V6ABL User Manual page 193

CONFIGURATIONS > Configuring various functions (Setup menu)
Setting the use of Extra Bass
Uses Extra Bass to enhance bass sound. If this function is set to "On", you can enjoy sufficient bass sounds,
regardless of the size of the front speakers and the presence or absence of the subwoofer.
Setup menu
"Speaker" > "Configuration" > "Extra Bass"
Settings
Off
On
Related links
"Basic operation of the Setup menu" (p.176)
Disables Extra Bass.
Enables Extra Bass.
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